You have created users in the portal or imported then using the User Management Engine (UME).
An assignment exists between users in the portal and the backend system (such as ECC system). You can ensure that this assignment is made by logging on using Single Sign-Onor by using user mapping.
Assign the following roles to each portal user:
HR Administrator
(com.sap.pct.erp.hradmin.HRAdministrator)
ERP Common (com.sap.pct.erp.common.erp_common)